Participatory evaluation of maize varieties for the management of maize gray leaf spot disease (Cercospora zeae maydis) at Gondar Zuria district, northwest Ethiopia

Abstract

Gray leaf spot is one of the major constraints of maize production in Ethiopia where warm humid environmental condition is prevailing. A field experiment was conducted in Gondar zuria district of western Ethiopia during 2016/17 and 2017/18 cropping season with the aim to evaluate effective maize varieties for the management of maize gray leaf spot disease. The experiment was laid out in Randomized Complete Block Design (RCBD) in three replications. Nine improved varieties, that is, SBRH, Gibie 2, Gibie 3, Argene, Jibat, BH-546, SPRH, Wonji, AMR-852 with one local maize were tested for GLS resistance. The genotype significantly varied and there were significant differences (P<0.05) in the overall mean of GLS incidence, severity, AUDPC%/day, yield and yield component among varieties. Data were analyzed using SAS version 9.2. The result indicated that the maximum disease incidence and area under disease progress curve (AUDPC), 58.8 and 214.83% per day respectively were recorded from local maize while the minimum incidence and AUDPC value, 22.7 and 150.49% per day, respectively were recorded from Gibie 2 maize variety. The maximum grain yield of 8611.7 kg/ha was recorded from Gibie 2 variety while the minimum grain yield of 4542.3 kg/ha was recorded from local maize. The study suggested that variety of Gibie 2 showed minimum grain yield loss which result to negligible loss of 1.47%, respectively and showed significant reduction of maize GLS incidence, with a corresponding increased grain yield of maize.

Genetic Dissection of Resistance to Gray Leaf Spot by Combining Genome-Wide Association, Linkage Mapping, and Genomic Prediction in Tropical Maize Germplasm

“…GLS poses a serious problem to maize production with estimated yield losses of more than 70% (Liu et al, 2016) under favorable conditions. The disease caused severe economic losses in SSA (Ward, 1996;Vivek et al, 2010;Kibata et al, 2011;Bekeko et al, 2018;Yigrem and Yohannes, 2019). Therefore, maize breeding programs in SSA typically incorporate GLS resistance in product pipelines.…”

Urea Split Application to Maize (Zea mays L.) Growth Stages of Medium Maturities, Influenced on Grain Yield and Parameter for Yield at Bako, East Wollega, Ethiopia

“…Consistent with the fndings of this investigation, Negash et al [25] observed that the combination of variety and split application time had a substantial impact on maize ear length. Similarly, the authors in [23] discovered that there was a considerable diference in ear length between the primary efects of diferent maize cultivars. According to Yusuf et al [26], diferent maize cultivars have dramatically varying cob lengths.…”

“…While the lowest 290 g was recorded from the interaction of the BH-546 variety with 1/2 dose N at planting and 1/2 dose of N at knee height (Table 8). Likewise, Ahmad et al [32] indicated that thousand grain weights were signifcantly afected by cultivars, their interaction between cultivars, and nitrogen time application [23]. It was established that the thousand-kernel weight showed signifcant diference at P < 0.05 among the main efect of maize varieties and their interaction between varsities and nitrogen time application.…”

“…Similarly, the authors in [21] indicated that ear width was signifcant diference between two varieties of maize. Te authors in [22] found that varieties of maize were significantly produced diferent ear height and ear diameter between two varieties of maize [23] revealed that the Gibe 2 variety produced the thicker ear diameter measurements, whereas the local maize variety produced the thinner ear diameter measurements. In addition, it was shown by Mosisa et al [24] that the nitrogen split administration had a substantial impact on the cob diameter of the maize variety.…”

Controlling of Maize Grey Leaf Spot by Interacting Host Resistance and Fungicide Spray Frequency at Bako, Ethiopia

“…, who found that higher disease pressure reduced grain yield, which was mostly due to increased blighting and premature death of photosynthetic tissues prior to grain filling. Similarly, Mengist and Moges (2019) found that local maize (check) had the largest yield loss (47.25 %) in maize varieties grown in the field, followed by AMR-852 maize variety with 47.25 % grain yield losses.…”